```(unsigned) weights (powers of two)
4096 2048 1024  512  256  128   64   32   16    8    4    2    1

1111 1101 0111 0110(b) = ? decimal

Note: the left-most bit is "on", so this is a negative value.
We can't directly convert negative values.
We first make the value positive, and convert that.

To convert a negative bit pattern to positive, we can either subtract
it from 0, or reverse (flip) all the bits and add 1.  Let's flip and add:

Negative:   1111 1101 0111 0110
flip bits:  0000 0010 1000 1001
-------------------
Positive:   0000 0010 1000 1010

Now add up the powers of two that make up this positive binary value:

0000 0010 1000 1010 = 2^9 + 2^7 + 2^3 + 2^1
= 512 + 128 +  8  +  2 = 650 decimal

This positive value is as positive as the negative number was negative.
Therefore, the original negative number must be the minus of this value:

1111 1101 0111 0110(b) = -650(d)

----

0000 0001 0110 0000(b) = ? decimal

Note: the left-most bit is "off", so this is a positive value.
We do not need to do any bit flipping.  Just convert it to decimal
by adding up powers of two:

0000 0001 0110 0000(b) = 2^8 + 2^6 + 2^5
= 256 +  64 +  32
= +352(d)

Hit the "Back" button.
```